JP3022144U - Chair - Google Patents

Abstract

(57) [Summary] [Purpose] This chair is used by elderly people who have weakened leg strength and people with disabilities in the legs and waist to obtain assistance when standing up from the chair. [Structure] In a chair having a seat portion including a lower plate and a seat plate fixed to a main body, a biased spring is inserted between the lower plate and the seat plate, and the end of the seat plate is inserted. A chair characterized in that a mounted spring locks the lower plate so that the lower plate can swing, and a bent portion of the spring is extended to the outside of the lower plate and the seat plate to accommodate the seat surface that is fixed in the seat part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chair used by the general public, particularly a chair used by people such as old people who have weakened leg strength.

[0002]

[Technical field to which the device belongs]

 It is generally known that special-purpose chairs used in theater halls, automobile interiors, etc. have movable seats, but these are for the convenience of storing the chairs. In general chairs used in offices and homes, the seating surface is fixed, and even if it is a movable chair, the seating surface is designed to reduce the impact when seated and to ensure a comfortable sitting comfort. There were only structures in which the seat itself was horizontal when it was seated, and which moved up and down slightly and the backrest part moved back and forth like the seat surface.

By the way, normally, when using a chair, when a person stands up from a seated state, an order in which the weight is gradually moved to the front and stands up while supporting the armrest part with a hand. It is common to go through. In this case, the body is to be loaded on the entire leg, but especially on the knee joint, strong stress is applied.

If the person is a healthy person, even if the chair rises from the seated state where no trouble is felt, it is difficult for the elderly such as those whose leg muscle strength has declined and those who are receiving medical treatment. It is easy to imagine that it is a motion. In hospitals, when an elderly person or the like stands up from a wheelchair, an attendant can often see the scene from the side of the patient, assisting the person in getting up from the chair.

In view of the recent progress of the rapidly aging society in Japan, especially in the daily life of the elderly, for example, it is inconvenient and inconvenient to stand up a chair, which is often overlooked by a healthy person with good physical strength. Or it seems necessary to come to complain.

Among the diseases of patients who visit orthopedics, along with back pain, the most common are the problems related to the knee, and the most common among middle-aged and elderly people is the knee-related problems caused by aging. Illness. It is said that the knee joint is loaded with about 4 times the weight even when walking on a level ground, and about 7 times the weight when going up and down the stairs. (50 ° on average, 65 ° on average when descending), and with age, the soft tissues such as cartilage and joint capsule covering the bones of the muscles and joints all deteriorate, and the symptoms tend to worsen. Is. As for the treatment method, it is necessary to correct the bad posture that puts a burden on the knees in daily homes, such as by going to the hospital, avoiding the motion of bending the knee deeply, and using a chair, bed or sofa.

[0007]

[Problems to be solved by the device]

 Since the chair is used in everyday life, it would be convenient if there was a chair that was relatively simple so that it could be stored under the seating surface of the chair, and provided with a device for assisting to stand up easily from the seated state. is there. Also, due to the nature of the chair, when using the power of a spring, etc., not only the entire chair, but also the spring itself has sufficient strength and durability to withstand a seating load of about 30 to 80 kg. It is necessary to secure the sex. For example, if a U-shaped spring is used, the bending radius can be set as large as possible in order to suppress the stress generated at the U-shaped portion, that is, the bending portion, within the elastic range. We must also solve the structural, dimensional, and strength restrictions that can be accommodated in the lower part. It is also necessary to keep the weight of the entire chair including the springs so that it can be easily moved for daily use.

The present invention has been made in view of the above circumstances, and when a person is seated on a chair, the lever of the stopper is manually pulled up with one hand without using electric power from a battery or the like. The chair solves the above problems by providing a chair that can obtain the force that assists the user to stand up from the chair by the reaction force of the U-shaped spring that has been removed from the chair.

[0009]

[Means for Solving the Problems]

 The present invention adopts the following configuration in order to achieve the above object. That is, in a chair that has a seat consisting of a lower plate and a seat plate fixed to the main body, insert a spring that is biased between the lower plate and the seat plate, and attach the end of the seat plate. It is characterized in that a spring is inserted into the lower plate so that the lower plate and the seat plate are pivotally locked, and the bent portion of the spring is extended to the outside of the lower plate and the seat plate, and the fixed seat surface is housed in the seat part. That is, according to the present invention, by exposing the bending portion of the U-shaped spring to the outside of the seat plate and the lower plate, the bending radius is secured as large as possible, and the generation response of the bending portion is suppressed within the elastic range. It also improves durability.

[0010]

[Work]

 In the chair of the present invention, when the lever of the stopper is raised with one hand to disengage it from the hook at the lower part of the seat plate, the reaction force of the U-shaped spring biases the seat surface in a horizontal state from the back of the seat surface. Draw an arc shape and jump up to the front. The bounced seat plate tilts at a maximum of about 45 degrees (when the seat is empty). If you sit down from that state, the reaction force of the spring will alleviate the impact when you sit down and the seating surface will be kept horizontal again. By using a U-shaped spring, the lower plate and the seat plate can be connected without using hinges, so the chair has a simple and durable structure.

[0011]

【Example】

 An embodiment will be described with reference to the drawings. As shown in FIG. 1, the main body of the chair has four main body legs 1 arranged in a frame, the height adjusting legs 2 are attached from the outside of the main body legs, and bolts are inserted from the outside to be heavy-weighted. . The height adjusting leg 2 is provided with a plurality of bolt holes corresponding to the main body leg 1, and can be adjusted in four stages, for example, according to the height of the person using the chair. The lower plate 6 is surrounded by four body legs 1, and one end of a biased U-shaped spring 7 inserted between the seat plate 5 and the lower plate 6 uses a bolt and a nut. It is firmly fixed. The seat plate 5 is supported by the U-shaped spring 7 in a state where the hook 11 is released from the stopper 10, and is fixed to one further end of the U-shaped spring 7 by using a bolt and a nut so as to swing up and down. Has been. If the U-shaped spring 7 is used, the core material, hinges, etc. required when using a coil spring or the like are unnecessary, and the chair has a simple and durable structure.

In order to obtain an appropriate spring reaction force according to the weight of the user, it is necessary to properly use the chair. FIG. 3 shows an example of a chair using two U-shaped springs 7 used by a person with a body weight of 30 kg to 50 kg. If a person with a body weight of 50 kg to 80 kg uses it, Use a chair with 3 springs 7.

The selection of the number of U-shaped springs is important especially for a person with a light weight or a person with a disorder in the legs or waist. For example, when a person with a disability in the legs or lower back uses it, if a spring with a strong reaction force is used, it will be thrown forward when standing up from the chair, which will cause imbalance, and rather the burden on the legs and lower back. It may cause the symptoms to worsen over time. Before use by persons with disabilities, it is necessary to obtain a doctor's diagnosis and permission in advance.

As shown in FIG. 4, the U-shaped spring 7 is inserted so that the bent portion 8 protrudes to the outside of the seat plate 5 and the lower plate 6, and this is mounted on the seat plate 5 and the lower plate 6. If the U-shaped spring 7 is completely inserted between the two, the bending radius will have to be made smaller, and if so, a stronger tensile stress will be generated in the bent portion 8, and on the contrary, both durability and reaction force will decrease. It is from. When the U-shaped spring 7 is inserted as in the present invention, the bending radii can be extended by the thickness of both the seat plate 5 and the lower plate 6, so that the bending radius is greater than that when the U-shaped spring 7 is completely inserted. The tensile stress of the portion 8 can be dispersed, and both durability and reaction force can be improved.

If the spring is made of rust-proof steel, there is no need for lubrication and the appearance is not impaired.

[0016] From the upper surface of the seat plate 5 to the part where the bent portion 8 of the U-shaped spring 7 is protruding, the seat plate 5 is detachably attached, for example, covered with a cloth 13 of acrylic cloth sewn with a velcro tape, and a cushioning material. As a result, a urethane foam is inserted between the seat plate 5 and the outer material 13. For the convenience of packing, the backrest 4 is temporarily attached so that it can rotate back and forth before assembly, but when a chair is used, it is inscribed almost vertically with the two body legs 1 at the rear. The lower end with bolts. Similarly to the outer material 13 on the seat plate, the backrest 4 is sewn with removable Velcro tape, and the outer material 13 made of acrylic fabric with cushion material is attached.

As shown in FIG. 3, hooks 11 project from the lower surface of the seat plate 5, and the rod-shaped stopper 10 is provided on the lower plate 6 with which the hooks 11 engage with the stopper 10. Two pedestals protruding from the lower plate 6 are pivotally supported on the surface portion. Handles 12 are formed at both ends or the right end of the stopper 10 so as to interlock with the stopper 10. The stopper 10 is formed in an inverted concave shape so that it can be engaged with the hook 11 on the lower surface of the seat plate 5 in the vicinity of substantially the center of the lower plate 6, and the handle portion 12 can be operated while a person is seated. As much as possible, the lower plate 6 and the seat plate 5 are molded so as to be exposed on both the left and right sides or the right side.

The seat plate 5 is kept horizontal with the lower plate 6 in a state where a person is seated and the hook 11 and the stopper 10 are locked, that is, in a locked state. When the hook 11 is released from the stopper 10 by operating to, the seat surface plate 5 draws an arc shape with the bent portion 8 of the U-shaped spring 7 as a base axis and tilts up to about 45 degrees (when the seat is empty), as shown in FIG. Then jump up to the front of the chair. A person sitting on a chair can use the reaction force of the U-shaped spring 7 to lift the armrest 3 from both sides of the chair if he or she puts his / her hands on the armrest 3 and prepares the arms, especially the knees. I can stand up.

When a person sits down with the stopper 10 locked to the hook 11, the seat plate 5 is horizontal, but if the hook 11 is released from the stopper 10 and the seat plate 5 is seated in a state of being flipped up, With the reaction force of the U-shaped spring 7, it is possible to relax while reducing the impact when sitting. In order to keep the seat plate 5 horizontal, a spacer 9 made of hard rubber is projected on the upper surface of the lower plate 6, and when the seat plate 5 descends, it comes into contact with the spacer 9 and the seat plate 5 becomes horizontal. Stabilize.

As described above, the present invention exerts a sufficient effect even when it is used not only in a chair that is used in daily life but also in a wheelchair, for example.

[0021]

[Effect of device]

 Since the present invention is configured as described above, the bending radius of the U-shaped spring is exposed to the outside of the seat plate and the lower plate to secure the bending radius as large as possible and to prevent the stress generated at the bending portion. It is kept within the elastic range to improve durability. In general, even an elderly person with weakened legs can easily sit and stand up in a chair used in daily life, and can compensate for the decline in leg strength due to old age. Even people with knee disabilities, etc. can easily sit and stand on a chair and can be expected to be useful as a health maintenance tool if used with the permission of a doctor according to their symptoms.

Although the present invention has been described in detail above, in addition to the above-described embodiments, a large number of structures can be obtained without departing from the scope and meaning of the utility model registration request of the present invention described in the utility model registration request. Obviously, the above modifications and applications are possible.

[Brief description of drawings]

FIG. 1 is a perspective view of an entire chair.

FIG. 2 is a side view showing a state in which a seat surface is raised.

FIG. 3 is an enlarged view of a main part of a rear surface with a seat surface raised.

FIG. 4 is an enlarged view of a main part of a side surface for explaining a state in which a bent portion of a spring is protruded and fixed to the outside of a lower plate and a seat plate.

[Explanation of symbols]

1. . . Body legs 2. . . Height adjustment legs 3. . . Armrest 4. . . Backrest 5. . . Seat plate 6. . . Lower plate 7. . . U-shaped spring 8. . . Bent portion 9. . . Spacer 10. . . Stopper 11. . . Hook 12. . . Handle part 13. . . Outer material

Claims (1)

[Scope of utility model registration request] 1. A chair having a seat portion composed of a lower plate and a seat plate fixed to a main body, wherein a biased spring is inserted between the lower plate and the seat plate, and an end portion of the seat plate is mounted. A chair characterized in that the seat is fitted with a seat surface in which the spring is inserted so as to be swingably locked from the lower plate, and the bent portion of the spring is extended to the outside of the lower plate and the seat surface plate and fixed.